What was found
PDIS 788 26-12 6589 03NOV23 BHM FACT U DESCENDING THROUGH 12000 MSL RECEIVED MAIN CARGO FIRE EICAS MESSAGE AND INDICATIONS. INDICATIONS WENT AWAY WHILE RUNNING QRH. AFTER LANDING RECEIVED EQUIPT OVERHEAT. EMERGENCY DECLARED. ***EMERGENCY DECLARED*** FACT 03NOV23 14:36 BHM U AMM: 26-16-30-5 UPON ARRIVAL CONFIRMED NO EVIDENCE OF SMOKE OR FIRE. PERFORMED SEVERAL TEST WITH NO FAULTS IAW 757 A.M.M. 26-16-30-5 SYSTEM CK'S GOOD. THE A/C WAS CARRING ALMOST 1000 LBS OF DRY ICE IN POS 4 WHICH IS BELIEVED TO SET OFF THE ALARM. OK TO CONTUNE SERVICE AT THIS TIME .